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When backspace is received at the beginning of a line and the previous line was

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wrapped, move the cursor back up to the end of the previous line.

Another one of the forgotten persons requested this quite a while ago (I need
to start noting names on todo items...) when it was quite hard to
implement. Now it is easy and I don't see it can do any harm, so hey presto...
This commit is contained in:
Nicholas Marriott
2009-10-12 16:59:55 +00:00
parent 693b3d03e6
commit 8608c6970d
3 changed files with 22 additions and 1 deletions
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20
screen-write.c
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@ -513,6 +513,25 @@ screen_write_cursorleft(struct screen_write_ctx *ctx, u_int nx)
s->cx -= nx;
}
/* Backspace; cursor left unless at start of wrapped line when can move up. */
void
screen_write_backspace(struct screen_write_ctx *ctx)
{
struct screen *s = ctx->s;
struct grid_line *gl;
if (s->cx == 0) {
if (s->cy == 0)
return;
gl = &s->grid->linedata[s->grid->hsize + s->cy - 1];
if (gl->flags & GRID_LINE_WRAPPED) {
s->cy--;
s->cx = screen_size_x(s) - 1;
}
} else
s->cx--;
}
/* VT100 alignment test. */
void
screen_write_alignmenttest(struct screen_write_ctx *ctx)
@ -536,6 +555,7 @@ screen_write_alignmenttest(struct screen_write_ctx *ctx)
s->cy = 0;
s->rupper = 0;
s->rlower = screen_size_y(s) - 1;
tty_write(tty_cmd_alignmenttest, &ttyctx);